plaisted



uit d @ai CHARLES C. PLAISTED, OF HARTFORD, CONNECTCUT.

Letters .Patent No. 87,967, lated .March 16, 1869.

IMPROVEMENT IN PENCIL-SHARPENERS.

To all whom 'it may concern.-

panyin g drawings, and to the letters of reference marked thereon.

Like letters in the figures indicate the saine parts.

My invention consists in a pencil-Sharpener which can remain attached to and form part cf a pencil when inuse.

It also consists in the peculiar construction of the Sharpener, for the purpose of eecting the object desired in the best manner.

Figure l shows a view of a pencil with my improved Sharpener, looking at the cutting-edge.

Figure 2 Shows a view at right angles to that shown in iig. l.

Figure 3 iS a bottom View of the Sharpener.

Figure 4 is a top view of the same.

`Figure 5 shows another form of Sharpener,with a spiral cutting-edge. A

Figure 6 is' a vertical section of the Sharpener and pencil as Shown in figs. l and 2.

A is an ordinary lead-pencil, and

B, the Sharpener.

a al is the cutting-edge.

b is a slit, cut'down on opposite sides of that part of the Sharpener which embraces the pencil, in order thatrthe spring of the two parts into which it is divided shall'clasp the pencil firmly.

c is a raised part, which is milled around its circum-` ference.to hold the cutter when Sharpening the pencil..

The Sharpener is intended to lit the wood of the pencil, through the part d, above the cutting-edge, below-which it is freed out to a larger diameter than the pencil, as is Shown in figs. 6, between e and e.

The cutting-edge a a is set in with a proper tool, after the inside is bored out, and the cutting-slot formed.

This places the edge at the proper angle for taking hold of the wood in cutting.

The cutting-edge a a, instead of being made straight, as in g. 1, canbe curved or spiral, as Shown in fig. 5, if desired.

My improved Sharpener can be turned from an ordinary piece of steel wire, rst boring the hole for the pencil, and then enlarging the bore at the part described, by moving the cutting-tool out from the centre; then turning the outside, milling the part c, and, when finished, cutting it oli from the end of the wire.

The slit b and the slot for the cutting-edge are then made.

The cutting-edge is set inward by a blow or pressure, and the edge sharpened.

The operation of my invention, when in use, 'is' as follows:

The pencil is inserted' in the Sharpener, pressed in, and turned gradually around. The cutting-edge shaves olf. the wood, and leaves the lead protruding from vthe bottom, ready for use.

When worn down, a few turns ofthe Sharpener again expose it, by Shaving away the wood.

My improved Sharpener can be detached from the pencil at any time, and 'attached to another.

Claim.

What I claim as my invention, and desire to Secure by Letters Patent, isv Constructing a pencil-Sharpener of one Solid piece of metal, by turning and boring, in such a manner that the part (l fits and 'clasps the pencil, in the manner described, and the part between e and e has its bore enlarged, to give a. better hold to the cuttingedge,when Set in at the proper angle,-Substantially as herein speci- CHARLES C. PLAISTED. Witnesses:

THEO. G.`ELL1S, CHARLES E. Fnnnows. 

